Schmidt SS 20.60, Instructions For Use Manual

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Instructions for Use SS 20.60 Page 6/16
Table of run-in and run-out distances
Flow obstacle upstream
of the measuring conduit
Minimum length of
the run-in distance
(L1) Minimum length of
the run-out
distance (L2)
Light bend (< 90°) 10 x D 5 x D
Contraction (conduit
contracts toward the
measuring area) 15 x D 5 x D
Expansion (conduit
expands toward the
measuring area) 15 x D 5 x D
90° bend or T-junction 15 x D 5 x D
Two 90° bends in one
plane 20 x D 5 x D
Two 90° bends with 3-
dimensional change in
direction
35 x D 5 x D
Shut-off valve 45 x D 5 x D
Table 1: Run-in and run-out distances
This table lists the minimum values required in each case. If the
listed straight conduit lengths cannot be achieved, the
measurement accuracy may be impaired
.